Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

A voltammetric study of galena immersed in acetate solution at pH 4.6

Abstract

The electrochemistry of galena in an acetate solution at pH 4.6 has been studied through the use of linear sweep voltammetry. Analysis of the voltammograms for anodic limits as high as 845 mV indicates that S0 is the sulphur-bearing species generated during the oxidative dissolution of galena. Furthermore, interpretation of the electrochemical data on the basis of thermodynamic considerations indicates that galena interacts with the acetate electrolyte and that Pb(CH3COO)2(aq) is also produced during anodic oxidation. When the scan direction is reversed in the cathodic direction, the oxidation products are removed by two reduction reactions when the solution is quiescent: the recombination of Pb(CH3COO)2 and S0 to form PbS and the reduction of S0 to H2S. In a stirred solution, only the second reaction is possible. Experiments conducted in the presence of 10−3 or 10−2 M lead acetate indicate that the presence of dissolved lead tends to inhibit the dissolution process. Furthermore, metallic lead can begin to deposit on the galena surface when the potential drops below about −330 mV SHE. The data also agree most closely with thermodynamics when Pb(CH3COO)2 is considered to be the aqueous species involved in the deposition and dissolution of metallic lead.

This is a preview of subscription content, log in to check access.

References

  1. [1]

    F. A. Forward and I. H. Warren,Met. Rev. 5 (1960) 137.

  2. [2]

    G. C. Bratt and R. W. Pickering,Met. Trans. 1 (1970) 2141.

  3. [3]

    H. R. Skewes,Proc. Aust. Inst. Min. Met. 244 (1972) 35.

  4. [4]

    P. E. Queneau and R. Schuhmann,J. Metals 26 (1974) 14.

  5. [5]

    D. Morin, A. Gaunand and H. Renon,Metall. Trans. 16 (1984) 31.

  6. [6]

    J. E. Dutrizac, Presented at the 114th AIME Annual Meeting, New York, February, 1985.

  7. [7]

    M. K. Han and M. E. Wadsworth,ibid. Presented at the 114th AIME Annual Meeting, New York, February, 1985.

  8. [8]

    J. Perez,Geomimet 135 (1985) 48.

  9. [9]

    J. E. Murphy, B. R. Eichbaum and J. A. Eisele,Miner. Metall. Process. 2 (1985) 38.

  10. [10]

    J. B. Brodie, Electrochemical Dissolution of Galena. M. Sc. Thesis, University of British Columbia, Vancouver, British Columbia, Canada, 1969.

  11. [11]

    P. Eadington and A. P. Prosser,Trans. IMM 78, (1969) C74.

  12. [12]

    G. Springer,78 (1970) C11.

  13. [13]

    R. L. Paul, M. J. Nicol, J. W. Diggle and A. D. Saunders,Electrochim. Acta 23 (1978) 625.

  14. [14]

    J. W. Johnson, J. Chang, R. A. Narasagoudar and T. J. O'Keefe,J. Appl. Electrochem. 8 (1978) 25.

  15. [15]

    J. R. Gardner and R. Woods,J. Electroanal. Chem. 100 (1979) 447.

  16. [16]

    M. Lamache, D. Bauer and J. Pegouret,Electrochim. Acta 26 (1981) 1845.

  17. [17]

    P. Sivenas and F. R. Foulkes,26 (1981) 1845.

  18. [18]

    A. E. Martell and R. M. Smith,Critical Stability Constants. Organic Ligands, Vol. 3. Plenum Press, New York (1977) 6.

  19. [19]

    T. R. Blackburn,Equilibrium. A Chemistry of Solutions. Holt Rinehart, New York (1969) 187.

  20. [20]

    G. H. Geiger and D. R. Poirier,Transport Phenomena in Metallurgy, Addison-Wesley, Reading, Massachusetts (1973) 463.

  21. [21]

    L. I. Antropoy,Theoretical Electrochemistry, (English Translation). Mir Publishers, Moscow (1972) 329.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Pritzker, M.D., Yoon, R.H. A voltammetric study of galena immersed in acetate solution at pH 4.6. J Appl Electrochem 18, 323–332 (1988). https://doi.org/10.1007/BF01093744

Download citation

Keywords

  • Reduction Reaction
  • Galena
  • Anodic Oxidation
  • Dissolution Process
  • Aqueous Species